1、新建项目：

2、添加Jar包：

在pom.xml中：

</dependency>

<artifactId>asm-commons</artifactId>

</dependency>

</dependency>

<groupId>commons-fileupload</groupId>

<artifactId>commons-fileupload</artifactId>

</dependency>

<groupId>commons-io</groupId>

<artifactId>commons-io</artifactId>

</dependency>

<groupId>org.apache.commons</groupId>

<artifactId>commons-lang3</artifactId>

</dependency>

<groupId>org.freemarker</groupId>

<artifactId>freemarker</artifactId>

</dependency>

<groupId>javassist</groupId>

<artifactId>javassist</artifactId>

</dependency>

</dependency>

<groupId>org.apache.struts</groupId>

<artifactId>struts2-core</artifactId>

</dependency>

<groupId>org.apache.struts.xwork</groupId>

<artifactId>xwork-core</artifactId>

</dependency>

<groupId>antlr</groupId>

<artifactId>antlr</artifactId>

</dependency>

</dependency>

<groupId>org.hibernate.common</groupId>

<artifactId>hibernate-commons-annotations</artifactId>

<version>5.0.2.Final</version>

</dependency>

<groupId>org.hibernate</groupId>

<artifactId>hibernate-core</artifactId>

<version>5.2.10.Final</version>

</dependency>

<groupId>org.hibernate.javax.persistence</groupId>

<artifactId>hibernate-jpa-2.0-api</artifactId>

<version>1.0.1.Final</version>

</dependency>

<groupId>org.javassist</groupId>

<artifactId>javassist</artifactId>

</dependency>

<groupId>org.jboss.logging</groupId>

<artifactId>jboss-logging</artifactId>

<version>3.3.0.Final</version>

</dependency>

<groupId>org.jboss.spec.javax.transaction</groupId>

<artifactId>jboss-transaction-api_1.1_spec</artifactId>

<version>1.0.1.Final</version>

</dependency>

<groupId>mysql</groupId>

<artifactId>mysql-connector-java</artifactId>

</dependency>

<groupId>junit</groupId>

<artifactId>junit</artifactId>

</dependency>

<groupId>org.junit.jupiter</groupId>

<artifactId>junit-jupiter-api</artifactId>

<scope>compile</scope>

</dependency>

<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
<scope>provided</scope>
</dependency>


<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>javax.servlet.jsp-api</artifactId>
<version>2.3.1</version>
<scope>provided</scope>
</dependency>

</dependencies>

<build>

<groupId>org.apache.maven.plugins</groupId>

<artifactId>maven-compiler-plugin</artifactId>

</configuration>

</plugin>

</plugins>

</pluginManagement>

<directory>src/main/resources</directory>

</resource>

<include>**/*.properties</include>

</includes>

<filtering>false</filtering>

</resource>

</resources>

</build>

3、hibernate自动生成实体类、映射文件：

1、连接mysql

成功：

2、添加hibernate插件支持：

成功结果：

3、Hibernate映射文件，需要添加主键生成策略：

①这是主键自增：

<generator class="identity"></generator>  <!—这是自增-->

②这是uuid 字符串唯一：

<generator class="uuid"/> <!-- 字符串唯一 -->

4、如果再次想生成实体类和映射文件：

5、创建hibernate核心配置文件：

Hibernate.cfg.xml

<!DOCTYPE hibernate-configuration PUBLIC

        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"

        "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">

  <hibernate-configuration>

    <session-factory>

        <!--*************1.数据源********************-->

        <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>

        <property name="hibernate.connection.url">

            jdbc:mysql://127.0.0.1:3307/hibernate?useUnicode=true&amp;characterEncoding=UTF-8&amp;serverTimezone=UTC

        </property>

        <property name="hibernate.connection.username">root</property>

        <property name="hibernate.connection.password">password</property>

        <!--扩展属性 必须指向数据库的方言 mysql版本低于5.5用MySQL5Dialect-->

        <property name="hibernate.dialect">org.hibernate.dialect.MySQL55Dialect</property>

        <!--自动创建表  一般不需要 常规项目先做数据库表-->

        <property name="hbm2ddl.auto">update</property><!--update自动更新-->

        <!--显示SQL-->

        <property name="hibernate.show_sql">true</property>

        <property name="hibernate.format_sql">true</property><!--格式化 好看一点-->


<property name="hibernate.current_session_context_class">thread</property>


        <!--**********2.注册实体*************************-->

        <mapping resource="com/lemon/pojo/Students.hbm.xml"></mapping>

        <mapping resource="com/lemon/pojo/Users.hbm.xml"></mapping>

    </session-factory>

  </hibernate-configuration>

注册实体：

配置数据库：

6、工具类：

HibernateUtils.java

package com.lemon.utils;

  

  

  import org.hibernate.Session;

  import org.hibernate.SessionFactory;

  import org.hibernate.cfg.Configuration;

  

  /**

 * 工具类：

 */

  public class HibernateUtils {

  

    private static SessionFactory sessionFactory;

  

    static {

        //1、加载配置

        Configuration configuration = new Configuration();

        configuration.configure("hibernate.cfg.xml");

        /*单例模式*/

        //得到工厂 工厂来生产操作数据库的对象

        sessionFactory = configuration.buildSessionFactory();

    }

  

    //2、得到session

    public static Session openSession() {

        return sessionFactory.openSession();

    }

  

    

    //获取session方式二：使用这个session必须开启事务

    public static Session getCurrentSession() {

        //受线程绑定，即在多线程下，线程是安全的

        return sessionFactory.getCurrentSession();

    }

}

7、测试：

package com.lemon;

  

  import com.lemon.pojo.Students;

  import com.lemon.utils.HibernateUtils;

  import org.hibernate.Session;

  import org.hibernate.query.Query;

  import org.junit.jupiter.api.Test;

  

  /**

 * 测试类

 *

 */

  public class App {

  

    //查找

    public void findById(){

        Session session = HibernateUtils.openSession();

        Query <Students> query = session.createQuery("from Students where id = ?", Students.class);

        query.setParameter(0,"S0000001");

        Students students = query.uniqueResult();

        System.out.println(students.getSname() + "\t" + students.getGender());

        session.close();

    }

  

    public static void main(String[] args) {

        App app = new App();

  

        app.findById();

    }

  

}

测试成功：

4、Hibernate与Struts2整合

4.1、添加web：

4.2、配置web.xml


<filter>
    <filter-name>struts2</filter-name>
    <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>
<filter-mapping>
    <filter-name>struts2</filter-name>
    <url-pattern>/*</url-pattern> 
</filter-mapping>
<welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
</welcome-file-list>

4.3、配置struts.xml

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE struts PUBLIC
        "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
        "http://struts.apache.org/dtds/struts-2.3.dtd">

<struts>
    
    <package name="default" namespace="/" extends="struts-default">

    </package>
</struts>

LemonSnm

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IDEA 整合 Struts2 + hibernate的demo

1、新建项目：

2、添加Jar包：

3、hibernate自动生成实体类、映射文件：

1、连接mysql

2、添加hibernate插件支持：

3、Hibernate映射文件，需要添加主键生成策略：

4、如果再次想生成实体类和映射文件：

5、创建hibernate核心配置文件：

6、工具类：

7、测试：

4、Hibernate与Struts2整合

4.1、添加web：

4.2、配置web.xml

4.3、配置struts.xml

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